API Standards Directory.
Upstream. Midstream. Downstream.
Browse the complete directory of American Petroleum Institute (API) standards covered by ISO Xpert - from quality management (Q1/Q2) and mechanical integrity (510, 570, 653) to offshore platforms, subsea equipment and functional safety. Click any standard to explore toolkits, gap analyses, internal audits and training.
API quality management standards
The foundational quality management system standards for manufacturing and service supply organisations in the oil & gas sector.
API Spec Q1
Quality Management - ManufacturingQMS requirements for manufacturing organisations in the petroleum and natural gas industry.
API Spec Q2
Quality Management - Service SupplyQMS requirements for service supply organisations in the upstream petroleum industry.
SIL 3
Safety Integrity Level 3Functional safety compliance for safety-instrumented systems (IEC 61508 / IEC 61511).
Inspection & integrity standards
Fixed equipment inspection codes and risk-based inspection methodologies that keep refineries, petrochemical and processing plants safe and compliant.
API 510
Pressure Vessel InspectionIn-service inspection, rating, repair and alteration of pressure vessels.
API 570
Piping Inspection CodeInspection, rating, repair and alteration of in-service piping systems.
API 653
Tank InspectionInspection, repair, alteration and reconstruction of aboveground storage tanks.
API 580
Risk-Based InspectionRecommended practice for implementing a risk-based inspection (RBI) programme.
API 581
RBI Quantitative MethodologyQuantitative risk-based inspection calculations and methodology.
API RP 571
Damage MechanismsDamage mechanisms affecting fixed equipment in the refining industry.
API RP 572
Pressure Vessel Inspection PracticesRecommended inspection practices for pressure vessels.
API RP 574
Piping Valves & FittingsRecommended inspection practices for piping system components.
Storage tank & terminal standards
Design, construction and operation standards for welded storage tanks, low-pressure storage tanks and terminal facilities.
API 650
Welded Tanks for Oil StorageDesign and construction of welded steel tanks for oil storage.
API 620
Low-Pressure Storage TanksDesign and construction of large, welded, low-pressure storage tanks.
API 2610
Terminal & Tank FacilitiesDesign, construction, operation, maintenance and inspection of terminal facilities.
Pipeline & welding standards
Pipeline welding, line-pipe specification and welding guidelines for upstream and midstream operations.
Offshore & subsea equipment standards
Design recommendations and equipment specifications for offshore platforms, cranes, blowout preventers, subsea wellheads and drilling equipment.
API RP 2A
Fixed Offshore PlatformsPlanning, designing and constructing fixed offshore platforms.
API RP 2D
Offshore CranesOperation and maintenance of offshore pedestal-mounted cranes.
API RP 14C
Production Safety SystemsAnalysis, design, installation and testing of surface safety systems on offshore production platforms.
API Spec 16A
Blowout PreventersDrill-through equipment specification for blowout preventers.
API Spec 17D
Subsea Wellhead EquipmentDesign and operation of subsea production systems - wellhead and tree equipment.
API Spec 6A
Wellhead & Christmas TreeSpecification for wellhead and christmas tree equipment.
API Spec 7-1
Rotary Drill Stem ElementsSpecification for rotary drill stem elements.
HSE & contractor safety standards
Safety and environmental management frameworks for offshore operations and contractor safety programmes.